Journal
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volume 74, Issue 19, Pages 5991-5996Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.01320-08
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- Indian Council of Scientific and Industrial Research-University Grant Commission
- European Molecular Biology Organization
- French governmental organization Bureau des Ressources Genetiques
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Fifty isolates from root nodules of soybean plants sampled in five agricultural-ecological-climatic regions of India were analyzed by PCR-restriction fragment length polymorphism analysis of the 16S rRNA gene, the intergenic spacer region between the 16S and 23S rRNA genes (IGS), and the nifH and nodC genes. Eight haplotypes assigned to the Bradyrhizobium genus were identified, and the genetic diversity was conserved across regions. Sequence analyses of the IGS and the dnaK, glnII, recA, and nifH genes revealed three groups. One of them (26% of isolates) was assigned to Bradyrhizobium liaoningense. A second group (36% of isolates) was identified as B. yuanmingense but likely forms a new biovar able to nodulate soybean plants. The third lineage (38% of isolates) was different from all described Bradyrhizobium species but showed the same symbiotic genotype as B. liaoningense and B. japonicum bv. glycinearum.
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